By Topic

Adaptive Joint Decoding and Equalization for Space-Time Block-Coded Amplify-and-Forward Relaying Systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Firag, A. ; Dept. of Electr. & Comput. Eng., Univ. of Canterbury, Christchurch ; Garth, L.M.

We develop practical time- and frequency-domain adaptive equalizers for distributed time-reversal space-time block-coded (TR-STBC) systems. The adaptive equalizers eliminate the need for explicit channel impulse response estimation at the receiver. The length of the time-domain adaptive equalizer is also independent of the data block length, making it particularly suitable for frequency selective fading channels with short delay spreads. We derive the block minimum mean square error solutions for both time- and frequency-domain distributed TR-STBC systems and from these we develop recursive least squares adaptive algorithms for the block structures. We use computer simulations to compare both the time- and frequency-domain adaptive equalizers for amplify-and-forward relay networks. We show that the adaptive algorithms work well for Protocols I and III proposed by Nabar The time-domain adaptive algorithms perform better than the frequency-domain algorithms, and overall the Protocol I receivers outperform the Protocol III receivers. We also show that, if only the Protocol III receiver is used, it can be susceptible to noise amplification due to a weaker source-to-relay link compared to the relay-to-destination link. This problem can be mitigated by using the Protocol I receivers with some extra complexity but much superior diversity performance.

Published in:

Signal Processing, IEEE Transactions on  (Volume:57 ,  Issue: 3 )